Remove long-deprecated abstract

CHANGELOG.md

@@ -31,6 +31,7 @@
   intMax : IO Int
   intMax = foreign FFI_C "#INT_MAX" (IO Int) 
   ```
++ The deprecated `abstract` keyword has been removed.
   
 ## Library Updates
 

samples/tutorial/BTreeMod.idr

@@ -1,20 +1,20 @@
 module btree
 
-abstract data BTree a = Leaf
-                      | Node (BTree a) a (BTree a)
+export data BTree a = Leaf
+                    | Node (BTree a) a (BTree a)
 
-abstract
+export
 insert : Ord a => a -> BTree a -> BTree a
 insert x Leaf = Node Leaf x Leaf
 insert x (Node l v r) = if (x < v) then (Node (insert x l) v r)
                                    else (Node l v (insert x r))
 
-abstract
+export
 toList : BTree a -> List a
 toList Leaf = []
 toList (Node l v r) = btree.toList l ++ (v :: btree.toList r)
 
-abstract
+export
 toTree : Ord a => List a -> BTree a
 toTree [] = Leaf
 toTree (x :: xs) = insert x (toTree xs)

src/Idris/Parser/Helpers.hs

@@ -260,7 +260,7 @@ float = token . P.try $ P.float
 reservedIdentifiers :: HS.HashSet String
 reservedIdentifiers = HS.fromList
   [ "Type"
-  , "abstract", "case", "class", "codata", "constructor", "corecord", "data"
+  , "case", "class", "codata", "constructor", "corecord", "data"
   , "do", "dsl", "else", "export", "if", "implementation", "implicit"
   , "import", "impossible", "in", "infix", "infixl", "infixr", "instance"
   , "interface", "let", "mutual", "namespace", "of", "parameters", "partial"
@@ -531,12 +531,6 @@ accessibility'
                               (fc, Msg "'public' is deprecated. Use 'public export' instead.")
                                    : parserWarnings ist }
                    return Public
-            <|> do fc <- extent $ reserved "abstract"
-                   ist <- get
-                   put ist { parserWarnings =
-                      (fc, Msg "The 'abstract' keyword is deprecated. Use 'export' instead.")
-                           : parserWarnings ist }
-                   return Frozen
             <|> do reserved "export"; return Frozen
             <|> do reserved "private";  return Private
             <?> "accessibility modifier"